[R-390] R-390 slugs

Mon, 06 May 2002 11:12:40 -0400

> Aren't there losses associated with different ferrites at different
> frequencies as well as things like relative permeability ? Just thinking
> aloud. Might be thinking rubbish.-
> Bryce not Bruce

Hi Bryce not Bruce

I believe all the slugs/cores in the non-A are iron powder, not ferrite,
whereas most of the slugs in the R-390A are ferrite cores.  The variation in
the iron powder cores was accomplished by varying the ratio of binders and
fillers to iron powder.  I'd imagine the instructions were to "mix well", or
maybe "shaken, not stirred."  Could have been some variation in
characteristics due to settling during setting/curing.

I don't have an RF deck handy right now to check manufacturer's ID on the
cans.  I've never seen anything printed on the non-A slugs I've seen.  If
anyone does have some ID on the cans, shoot the info over to Mark Masin as
he requested earlier.

Barry

>
> >>> "Veenstra, Lester B." <[email protected]> 05/06/02 03:26PM
> >>>
> Wrap a standard number of turns aound it and measurwe the L.
>
> -----Original Message-----
> From: Cecil Acuff [mailto:[email protected]]
> Sent: Sunday, May 05, 2002 9:59 AM
> To: Barry Hauser; [email protected]
> Subject: Re: [R-390] R-390 slugs
>
>
> Hi Barry,
>
>         You must have been reading my mind as I was reading your post!
> There has to be some analytical way of measuring the permeable or
> ferro-resonant characteristics of the individual slugs.  (not sure
> those are
> the right terms)
>
> I'll have to think on this one for a while!
>
> Cecil..
>
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